Original BMW Auxiliary Pusher Fan for BMW E39 525i, 528i, 530i, 540i, and M5 (1998–2003)

BMW's auxiliary pusher fan, part 64-54-6-921-395, is the electric fan that drives air through the A/C condenser on the E39 5 Series 525i, 528i, 530i, 540i, and M5 (1998–2003). A pusher fan mounts on the front side of the heat exchanger it works with and blows air rearward through the fins, adding airflow when the car is moving slowly or standing still. An electric motor turns the blades, and the DME, BMW's engine control unit, switches it on electronically. The assembly weighs 3.8 kg (8.4 lb) and is sold as a single unit.

Original BMW Parts carry a 24-month parts warranty.

The part goes by two names, auxiliary fan and pusher fan, and BMW uses the second. BMW shows the current number in production from March 2005. It replaced 64-54-6-921-946, and BMW rates the newer fan as a backward-compatible replacement for cars built with the earlier one. BMW numbers 64-54-6-919-057, 64-50-6-908-030, and 64-54-8-380-781 also cross to this assembly, which helps when matching it to an old invoice or service record. Within this group of E39 models, BMW applies the same fan regardless of engine, six-cylinder or V8, so there is no engine-specific version to choose.

Technical Details

• Manufacturer: BMW, Original BMW part
• Part number: 64-54-6-921-395
• BMW part name: pusher fan, also known as the auxiliary fan assembly
• Function: pushes air through the A/C condenser
• Drive: electric motor, activated electronically by the DME
• Weight: 3.8 kg (8.4 lb)
• Production start: March 2005
• Replaces 64-54-6-921-946, backward compatible
• Sold as one fan assembly
• Warranty: 24 months on Original BMW Parts

Common Questions

Why does the pusher fan run with the air conditioning on?
The condenser needs airflow to shed heat from the refrigerant, so on these E39 models the fan usually turns on whenever the A/C is running.

Should I replace a fan with a damaged blade if it still spins?
Yes. A pusher fan that has stopped running or has damaged blades should be replaced right away.

PMB carries genuine BMW climate and cooling parts for the E39 5 Series.

Fitment & Compatibility

Check the table below for the exact year, model, submodel, and any listed notes. Send your VIN and PMB Performance will confirm the fit, drawing on more than 20 years in the trade.